Blood transfusion machine



Dec. 14, 1937. ,1 FERR ARA Er AL 2,102,523

BLOOD TRANSFUS ION MACHINE Filed March 25, 1936 2 Sheets-Sheet l g Z7 25 22 4? E 52 5 5 7 WJEWaTd/ 3 WfiainEDeew WITNESS ATTORNEY Dec. 14, 1937. 5. J. FERRARA ET AL 2,102,523

BLOOD TRANSFUS ION MACHI NE Filed March 23, 1936 2 Sheets-Sheet 2 Patented Dec. 14, 1937 PATENT OFFICE BLOOD TRANSFUSION MACHINE Samuel J. Ferrara and William E. Deen, Peru, Ind.

Application March 23, 1936, Serial No. 70,462

2 Claims.

This invention relates to blood transfusion machines, and has for the primary objectthe provision of a device of this character which will permit a direct unmodified blood transfusion to be successfully performed wherein blood may be taken from a donor and delivered directly to a patient and at a desired temperature and at a selected period of time and with a recording of the amount of blood transfused.

With these and other objects in view, this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and claimed.

For a complete understanding of our invention, reference is to be had to the following description and accompanying drawings, in which Figure 1 is a top plan view illustrating a blood transfusion machine constructed in accordance with our invention.

Figure 2 is a side elevation, partly in section, illustrating the same.

Figure 3 is a fragmentary view, partly in section, showing the construction of the pump.

Figure 4 is a sectional view taken on the line 4-4 of Figure 1.

Figure 5 is a perspective view illustrating a retaining ring of the pump.

Figure 6 is a diagrammatical view showing the wiring diagram of the pump.

Figure 7 is a fragmentary perspective view illustrating the drive for the counter.

Referring in detail to the drawings, the numeral I indicates a suitable casing in which is mounted an electric motor 2 and a gear drive mechanism 3. The gear drive mechanism is of any conventional construction and is coupled to the electric motor, as shown at 4, and includes a driven shaft 5. The housing of the gear drive 3 extends through the top wall of the casing and forms a support for a pump housing 8. The electric motor 2 is connected in an electric circuit 1 and also connected in said circuit is a hand controlled rheostat 8 operable from the exterior of the casing l-for the purpose of stopping and starting the electric motor and controlling the speed thereof. The pump housing I is heated by an electrical heater I and the latter is electrioally connected to the circuit I and also to manually controlled thermostat Ill. The thermostat is operable from the exterior of the casing and is located adjacent the rheostat.

The pump housing I is iixed against rotation with the driven shaft 5 extending centrally there- 5 through. The pump housing includes a chamber H formed by an annular wall l2 and said wall is provided with a groove l3 cooperating with a groove M in a retaining element l5 to provide a seat of annular formation for receiving a semitransparent hose l6. The hose where leaving the seat is supported by diverging arms l8 and connected to'the ends of the hose are sight tubes 19 and the latter have connected thereto surgical needles 20. The needles are of the type for puncturing veins and for taking in blood or for expelling blood into the veins. The retaining flange i5 fits the wall l 2 of the pump housing and is apertured to receive members 2i which extend through a flange 20 formed on the pump housing. Said members are threaded to receive nuts 22. Coil springs 23 are mounted on the members between the flange 20 and the retaining ring !5, which springs act to urge the retaining ring away from the wall [2 of the pump housing. A securing ring 25 engages the flange 20' and has keyhole slots 26 to receive the members 2i after passing through the flange 29. Cam faces 21 are formed on the securing ring 25 and have the slots 26 located therein. The heads of the members 2| ride against the cam faces so that when the securing ring is rotated in one direction it will cause the retaining ring to be forced in the direction of the wall I2 on the pump housing to place a desired pressure on the hose located in the seat.

A spider 28 is secured to the shaft 5 and includes arms 29 to which are pivoted links 30 and the latter have journaled thereto rollers 3| The rollers contact the hose and cause a squeezing action thereon. The spider rotates in the direction indicated by the arrows in Figure 3 and the rollers moving with said spider and against the hose confined in the seat will cause fluid to be drawn into one of the needles and expelled by the other needle.

A counter 32 is driven by the gear drive mechanism 3 and is viewable through the top of the casing, the purpose of which indicates the amount of fluid being taken in and expelled by the pump. The pump housing being electrically heated provides means whereby the fluid passing through the pump may be raised to a desired temperature.

In operation, one of the needles is inserted in the vein of a donor of blood and the other needle is inserted in a vein of a. patient and the electric motor is started in operation so that the blood may be taken from the donor and forced into the patient and the blood either kept from chilling during the transfusion or raised to a desired temperature by the electrical heater controlled by the. thermostat. The speed of operation of the pump is governed by the operation of the electric motor and the latter is controlled by the rheostat.

The described machine will permit a direct continuous transference of blood from a donor to a patient and afiords facilities for the proper control of the temperature of the blood and also records the amount of blood transfused within a given period of time.

Having described the invention, we claim:

1. In a blood transfusion machine including intake and discharge means connected by a flexible hose, a casing, a pump housing supported by said casing and including an annular portion having an annular groove for receiving a portion of said flexible hose, a retaining member removably mounted to the annular portion and having an annular groove cooperating with the first-named groove in forming an annular seat, a driven shaft extending into the pump housing from said casing, a spider secured to said shaft, rollers pivotally and rotatably secured to the spider and contacting the hose within the annular seat for forcing blood through the hose, and power means for driving the shaft and located in the casing.

2. In a blood transfusion machine including intake and discharge means connected by a flexible hose, a casing, a pump housing supported by said casing and including an annular portion having an annular groove, for receiving a portion of said flexible hose, a retaining member removably mounted to the annular portion and having an annular groove cooperating with the firstnamed groove in forming an annular seat, a driven shaft extending into the pump housing from said casing, a spider secured to said shaft, rollers pivotally and rotatably secured to the spider and contacting the hose within the annular seat for forcing blood through the hose, an electric motor located in the casing, a drive means between the electric motor and the driven shaft, and a control for said electric motor.

SAMUEL J. FERRARA. WILLIAM E. DEEN. 

